Deviation from the theoretical predictions in the synthesis of amphiphilic block copolymers in a wide range of compositions based on poly(vinyl chloride) by single electron transfer: Degenerative chain living radical polymerization in suspension medium

Abstract

This work deals with the synthesis of different poly(vinyl chloride) (PVC) based block copolymers, containing poly(hydroxypropyl acrylate) segments having different compositions and molecular weights. These copolymers were synthesized via single electron transfer‐degenerative chain living radical polymerization. The block copolymers prepared showed deviations from the theoretical predictions in terms of molecular weight and polydispersity, which were ascribed to the heterogeneous nature of the reaction mixture. The technical problems addressed are important to the establishment of the required technological improvements for the industrial implementation. It has been shown that the control over the composition of the block copolymers is only achieved when the amount of vinyl chloride used in the second step of the polymerization was relatively high. The adhesion performance of these block copolymers in PVC‐wood flour composite formulations was studied by assessing the mechanical performance of such composites, when the copolymers were included in the composite formulations. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

The effect of crystallites on the rheological properties of microphase‐separated PVC‐PBA‐PVC triblock copolymers obtained by single electron transfer‐degenerative chain transfer living radical polymerization

“…In the particular case of poly(vinyl chloride) (PVC), the new methodology discovered by Percec et al, named single electron transfer‐degenerative chain transfer living radical polymerization (SET‐DTLRP), opens the door to obtain block copolymers, polymerizing vinyl chloride “in situ” in a macroradical of another monomer or vice versa . This method, that does not involve particular difficulties to be deployed at an industrial level, has been recently employed by Rocha et al for the synthesis of PVC‐based block copolymers containing different segments of poly(hydroxypropyl acrylate) .…”

Poly(ethylene glycol)-block-poly(4-vinyl pyridine) as a versatile block copolymer to prepare nanoaggregates of superparamagnetic iron oxide nanoparticles

“…1,2 Controlled/living radical polymerization (CLRP) methods 3,4 are powerful methods for preparing tailor-made telechelic polymers and related amphiphilic block copolymers that have well controlled molecular weights, composition and architecture, under mild reaction conditions. [5][6][7][8][9] In the presence of inorganic species, the self-assembly of amphiphilic block copolymers can be used to afford hybrid nanoparticles that possess controlled nanostructured morphology. 10 The coating of magnetic nanoparticles with polymers has oen been assumed to be an efficient means of avoiding agglomeration on the basis of electrostatic or static repulsion.…”